Creating Brownie Bottom Cheesecake can be easy if you follow these concise steps:

1. Preheat the Oven: Preheat your oven to 325°F (160°C). Prepare a 9-inch springform pan by greasing it lightly.

2. Make the Brownie Base: In a saucepan, melt the unsalted butter over low heat. Remove from heat and stir in the sugar, eggs, and vanilla until well combined.

3. Combine Dry Ingredients: In a separate bowl, whisk together flour, cocoa powder, and salt.

4. Combine Mixtures: Gradually stir the dry mixture into the wet brownie mixture until just combined. Don’t overmix.

5. Pour into Pan: Spread the brownie batter evenly into the prepared springform pan.

6. Bake Brownie Layer: Bake in the preheated oven for about 25-30 minutes, or until a toothpick comes out with a few moist crumbs.

7. Prepare the Cheesecake Filling: While the brownie base is baking, whisk together softened cream cheese and sugar in a large bowl until smooth.

8. Add Other Ingredients: Mix in the eggs one at a time, followed by the vanilla extract, sour cream, and heavy cream until thoroughly combined.

9. Layer the Cheesecake Filling: Once the brownie base is done baking, pour the cheesecake filling over it evenly.

10. Bake Cheesecake: Return to the oven and bake for an additional 25-30 minutes. The cheesecake should be set but slightly jiggle in the center.

11. Cool the Cheesecake: When finished, turn off the oven and crack the door open. Let the cheesecake cool in the oven for about an hour, then remove and chill in the refrigerator for at least 2 to 3 hours.

12. Release from Springform Pan: Once chilled, carefully run a knife around the edges and release the springform pan.